dured udred drued rdued urded ruded duerd uderd deurd edurd uedrd eudrd dreud rdeud derud edrud redud erdud uredd ruedd uerdd eurdd reudd erudd durde udrde drude rdude urdde rudde dudre uddre ddure ddure uddre dudre drdue rddue ddrue ddrue rddue drdue urdde rudde udrde durde rdude drude duedr udedr deudr edudr ueddr euddr duder udder dduer dduer udder duder dedur eddur ddeur ddeur eddur dedur ueddr euddr udedr duedr edudr deudr dredu rdedu derdu edrdu reddu erddu drdeu rddeu ddreu ddreu rddeu drdeu dedru eddru dderu dderu eddru dedru reddu erddu rdedu dredu edrdu derdu uredd ruedd uerdd eurdd reudd erudd urded ruded udred dured rdued drued uedrd eudrd uderd duerd edurd deurd redud erdud rdeud dreud edrud derud
Note: these 'words' (valid or invalid) are all the permutations of the word dured. These words are obtained by scrambling the letters in dured.